I'm sure you've seen Kenji's Serious Eats post about his allegedly supernal Bolognese. (I wonder if the harder and chewier bits were perhaps bits of bone that got ground along with the meat Or hoof. Or ear.).
I have this book..
Purchased in Bologna.
I know it can be translated, just not by me, right now. Appears there is plenty of pork in the ragu, however.